When a creature moves into the space opposing a card bearing this sigil, they are dealt 1 damage.
Sentry is a sigil that causes a card to deal 1 damage to any creature that enters the space opposing it. This can include if the card is played in that space or moves to that space using a sigil such as Sprinter or Clinger. If a card bearing this sigil also possesses the Touch of Death sigil, this sigil's damage can also instantly defeat the opposing card if the attack is not blocked by Nano Armor.